C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 28/14 (2006.01) C04B 40/06 (2006.01)
Patent
CA 2514322
A ready-mixed composition, which sets when mixed with an activator for the reaction of calcined gypsum with water to form set gypsum, is disclosed. The composition comprises water and calcined gypsum in a weight ratio of water to calcined gypsum of from about 0.15 to about 0.5, as well as a set preventer comprising a polyacrylic acid and/or a salt thereof. The composition has a viscosity of from about 5,000 centipoise to about 48,000 centipoise. Also disclosed is a kit that comprises separately packaged components. One of the components is a composition comprising calcined gypsum and a polyacrylic acid and/or a salt thereof, and, optionally, water. Another component of the kit comprises an activator which, when mixed with the composition, permits the composition to set.
L'invention porte sur une composition toute préparée qui se solidifie lorsqu'elle est mélangée à un activateur au cours de la réaction du gypse calciné avec de l'eau de façon à former un gypse solidifié. La composition comprend de l'eau et du gypse calciné dans un rapport pondéral eau/gypse calciné compris entre environ 0,15 et environ 0,5, ainsi que sur un agent de prévention solidifié comprenant un acide polyacrylique et/ou un sel de celui-ci. La composition a une viscosité d'environ 5,000 centipoises à environ 48,000 centipoises. L'invention porte également sur un kit comprenant des composants conditionnés séparément. L'un des composants est une composition comprenant du gypse calciné et un acide polyacrylique et/ou un sel de celui-ci, et éventuellement de l'eau. Un autre composant du kit comprend un activateur qui, lorsqu'il est mélangé à la composition, permet de solidifier la composition.
Liu Qingxia
Natesaiyer Kumar
Yu Qiang
Company United States Gypsum
Moffat & Co.
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